Monacor SP-46A/500PA
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.25 |
| Qes | 0.26 |
| Qms | 6.65 |
| Vas | 285 L |
| Sd | 1180 cm² |
| Xmax | 6 mm |
| Re | 6.4 Ω |
| Bl | 29.9 T·m |
| Mms | 192.8 g |
| Pe | 500 W |
| Sensitivity | 97.7 dB |
Alignment hint
| EBP | 115 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 40.7 L |
EBP > 100: favours a ported (bass-reflex) alignment.
Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.
Substitute candidates
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| B&C 18 PZB 100 | 30 = | 0.243 -0.01 | 297 +12 | 7.8 +1.8 | 98.8 +1.1 | close | + | |
| B&C 18PZB100 | 30 = | 0.24 -0.01 | 297 +12 | 8 +2 | 97 -0.7 | close | + | |
| Oberton 18NSW700-8 | 30.5 +0.5 | 0.243 -0.01 | 309 +24 | 7.7 +1.7 | 98.6 +0.9 | close | + | |
| B&C 18 NW 100 | 31 +1 | 0.254 = | 252 -33 | 8.7 +2.7 | 98.4 +0.7 | close | + | |
| Oberton 18NSW700 | 30.48 +0.48 | 0.243 -0.01 | 309.02 +24.02 | 14 +8 | 97.5 -0.2 | close | + | |
| B&C 18NW100 | 31 +1 | 0.26 +0.01 | 252 -33 | 9 +3 | 98 +0.3 | close | + | |
| RCF LF18N401 | 32 +2 | 0.26 +0.01 | 257 -28 | 9 +3 | 98 +0.3 | close | + | |
| RCF LF18N451 | 31 +1 | 0.24 -0.01 | 245 -40 | 9 +3 | 97.5 -0.2 | close | + | |
| 18 Sound 18NLW9400 | 33 +3 | 0.26 +0.01 | 268 -17 | 9.5 +3.5 | 98 +0.3 | close | + | |
| B&C 18 TBX 46 | 31 +1 | 0.277 +0.03 | 270 -15 | 9 +3 | 98.2 +0.5 | close | + |
Compare the closest 3 against the SP-46A/500PA →
Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.
Used in enclosures (0)
No enclosure in the catalog uses this driver yet.